Irrigation Systems and Components - PowerPoint Presentation

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Irrigation Systems and Components

USDA is an equal opportunity provider and employer.

Construction

Inspection for Field Office Activities

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Objectives:

Understand the different type of irrigation systemsUnderstand the requirements for irrigation filtration

Understand the requirements for pumping stations

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Typical NRCS Irrigation Practices

442 – Center Pivot (or Linear)442 – Wheel Line (Linear Move)442 – Hand Lines442 – Others, Big Gun, Solid Set, K-Line (pods),

441 – Drip Irrigation443 – Surface and Subsurface

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NRCS Irrigation Practice Associations

430 – Irrigation Pipeline533 – Pumping Plant587 – Structure for Water Control642 – Well

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Center Pivot Irrigation System

Terms Used:

SpansTowers

Truss

Drive motors

Pivot point

Main Pipe

Nozzles

Drops

Riser Pipes

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Center Pivot Point

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Center Pivot Inspections

Pivot Point ConcreteMeets Manufactures Requirements and any associated NRCS State Concrete Installation Requirements, including Construction and Material Specifications.All Pivot Manufactures have different concrete and rebar requirements.

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Center Pivot Stop

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Center Pivot Stops

Generally comes with the Pivot Package and is an engineered component of the system. No “In-Field” or contractor/landowner constructed center pivot stops are generally allowed.

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NRCS Standards and Specifications must be met for IWM and Uniformity for Each State/Region based on the 442-Irrigation System Sprinkler Standard.

System Package Acceptance is Based on the Nozzle Package and the Height of the Nozzles.

Center Pivot Nozzles

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Regulator Size

Nozzle

Size

Sprinkler Plate

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Nozzle Height

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Sprinkler Package Sheet to Check

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Make Sure all Nozzles, Plates and Regulators Match the Sprinkler Package

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LB20

R3000

RED

#26 White

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Linear

Move Irrigation Systems

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Center Pivot Linear Move Irrigation Systems

Same Type of Checks for the Sprinkler Package.Nozzle Height, Nozzle Size, Sprinkler Plate, Pressure Regulators.

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Wheel Line Irrigation System

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Wheel Line Irrigation System

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Wheel Line Irrigation System

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Impact Sprinkler

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Flow Control Nozzle, Sizes are Stamped on the Side, Sizes for Flow Through Nozzles are on the face.

Wheel Line Irrigation System

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Wheel Line Inspections

(Linear Move)Inspection ComponentsDirection of Layout and Length of Wheel Line

Pipe sizes of the Wheel LineWheel Line Wheel SizeRiser Spacing(During Pipe Installation)Nozzle Size and Type (Straight Flow vs. Flow Control)

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Handline Sprinkler Irrigation

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Handline Irrigation System

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Hand Line Inspections

Inspection Components are Similar to Wheel LinesDirection of Layout and Length of LinesPipe sizes of the Hand Lines

Riser Spacing(During Pipe Installation)Nozzle Size and Type (Straight Flow vs. Flow Control)

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Other Sprinkler Irrigation Types

Big Gun Sprinklers (Movable)Big Gun Sprinkler (Solid Set)Solid Set Impact SprinklersK-Pods

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Big Gun Irrigation System

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Big Gun Operating Parameters

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Big Gun Sprinklers

Cart Big Guns (movable)Cart is factory made so check # of carts and nozzle sizes and riser spacing(during pipe installation)Big Gun Solid Set (Stationary)

Check # of sprinklers and nozzle size

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Solid Set Irrigation

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Solid Set Sprinklers

Solid Set Sprinklers can be Large Sprinklers or Small Impact Sprinkler HeadsInspection of Solid Set SystemsRiser spacing is inspected during pipeline installation.

Nozzle size and typeHeight off ground, pipe type and size, and method stabilized.

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Pod (K-Line,

Irripod

) Sprinklers

POD, with sprinkler

Dragline,

different length.

POD connection line

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Pod Sprinklers

Inspection of Pod SystemsNozzle sizesSpacing between sprinklersPipe size on drag lines

Riser placements and sizingOverall length of each line

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441 – Irrigation System, Micro-Irrigation (Drip)

Drip Systems can require Zones, Valves, Filtration and EmittersInspection of Drip Systems are Application Specific and Each System is Different

I will Cover Filtration Separately, shortly..

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Drip Irrigation Components

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Drip Irrigation Components:

con’t

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Drip Irrigation Components:

con’t

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Drip System Inspection

Tape SizingTape SpacingMain Line and Lay Flat Pipe SizingAcreage for System and Each Zone

Valve Sizing, Type and PlacementPressure Reducing Stations (Size and Location)Filtration

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Tape Sizing

Tape

Type Design

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Tape Spacing

Tape

Spacing

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Header Pipe Sizing

Drip Tape Spacing

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Header Pipe

Sizing

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Acreage Certification

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443 – Surface and Subsurface Irrigation

Surface Systems Include Lined, and un-lined, Ditches, Furrow, Surge, Border, Gated Pipe, etc.443 Inspection would typically include the following,Any land leveling

Concrete inspection for lined canals and ditchesGated pipe size, gate spacing and placementHead works including filtration, head gates, valves, etc.

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Surface Irrigation

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Concrete Ditch/ Siphon Tube

Surface Irrigation

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Gated Pipe

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Gated Pipe Check

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Gated Pipe Check

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Drip Filtration Inspection

There are many different filtration systems for drip irrigation.Size (number) of filters is part of the system design.Filtration Inspection includes many appurtenances including the following.

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Sand Media Filters

Sand Filter Pod

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Spinning Screen Filter with Control Valves

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Cartridge Filters

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Inline Pressure Filters

Checked

for Size, Diameter and Height

Checked

for Elevation of Top and Invert of Structure

Checked

for Material Construction

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Turbulent Fountain Filters (Bubbler)

Checked

for Size, Diameter and Height

Checked

for Elevation of Top and Invert of Structure

Checked

for Material Construction

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Flow Meters

Doppler Flow Meter

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Chemigation

Schematic

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Chemigation Systems

Chemical Hopper

Injection Pump

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Associated Components of an Irrigation System to be Checked

Any Designed Valves, Filters or Structures for the System Application.533 – Pumping Plant

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Valve Sizing, Type and Placement

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Air/

Vac Relief Valve

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Sprinkler System Riser Connection and Pressure Relief Valve and Air/

Vac

Valve

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Drain Valve/ Flush Valve

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Isolation Valves

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Main Pressure Reducing Valve

Sand Filter Pod

Pressure Reducing Valve and Gauge

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Associated Components of an Irrigation System to be Checked

533 – Pumping Plant

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Centrifugal Pumps

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Pump Curve for Pumping Station

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Pumping Plants (Diesel)

Check for Pump Size, Model, Impeller Dia., etc.

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Pumping Plants (Diesel)

Check for Pump Size, Model, Impeller Dia., etc.

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Pumping Plants (Electric)

Checked

for Location and Designed Support

Check for level

Check for leaks

Check for Concentric reducer orientation

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Pumping Plants (Diesel)

Checked for Location and Designed Support

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Pumping Plant Appurtenances, cont.

Checked

for Size, Diameter and Type of Pressure Reliefs and Air Vents

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Pumping Plant Appurtenances, cont.

Check for Type of Pipe Required, Painting

and Coatings and Any Thrust Control Required

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Don’t Forget to Check for Leaks!

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Questions?